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Re: benchmarking - it's now all(-1,0,1,5,6)% faster

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From:
Peter Nimmervoll
Date:
January 12, 2003 11:12
Subject:
Re: benchmarking - it's now all(-1,0,1,5,6)% faster
Message ID:
3E214F85.7030207@gmx.at
hv@crypt.org wrote:

>Nicholas Clark <nick@unfortu.net> wrote:
>:So I'm confused. It looks like some bits of perl are incredibly sensitive to
>:cache alignment, or something similar. And as a consequence, perlbench is
>:reliably reporting wildly varying timings because of this, and because it
>:only tries a few, very specific things. Does this mean that it's still useful?
>
>I think I remember seeing a profiler that emulates the x86 instruction set,
>and so can give theoretically exact timings. Does this ring a bell for
>anyone? I don't know if the emulation extended to details such as RAM
>and cache sizes ...
>  
>
Do you mean Valgrind ?
You can get it from http://developer.kde.org/~sewardj/

Peter

>Hugo
>
>
>  
>
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